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| Troubleshooting | |
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Problem |
| What To Check | What To Do | |
| (If check is OK, go to next check) | (When check is not OK, refer to this column) | ||
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Motor runs and pump | 1. | Prime Valve Open. | Close prime valve. | |
strokes |
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2. | Paint supply. | Refill and reprime pump. | ||
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| 3. | Intake strainer clogged. | Remove and clean, then reinstall. | |
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| 4. | Suction hose leaking air. | Tighten nut. Check | |
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| 5. | Intake valve ball and piston ball | See Pump Manual 309250. Strain paint before | |
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| are seating properly. | using to remove particles that could clog pump. | |
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| 6. | Leaking around throat packing | See Pump Manual 309250. | |
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| nut which may indicate worn or |
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| damaged packings. |
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| 7. | Pump rod damaged. | See Pump Manual 309250. | |
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Motor runs but pump does | 1. | Displacement pump pin dam- | Replace pump pin if missing. Be sure retaining | |
not stroke |
| aged or missing. | spring is fully in groove all around connecting | |
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| rod. See page 14, Displacement Pump | |
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| Replacement. | |
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| 2. | Connecting rod assembly for | Replace connecting rod assembly. See page | |
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| damage. | 14, Displacement Pump Replacement. | |
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| 3. | Gears or drive housing. | Inspect drive housing assembly and gears for | |
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| damage and replace if necessary. See page 16, | |
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| Drive Housing Replacement. | |
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Motor is hot and runs | 1. | Be sure ambient temperature | Move sprayer to shaded, cooler area if possible. | |
intermittently |
| where sprayer is located is not |
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| more than 115°F (46°C) and |
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| sprayer is not located in direct |
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| sun. |
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| 2. | Motor has burned windings indi- | Replace motor. See page 27, Motor | |
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| cated by removing positive (red) | Replacement. | |
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| brush and seeing burned adja- |
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| cent commutator bars. |
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| 3. | Tightness of pump packing nut. | Loosen packing nut. Check for leaking around | |
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| Overtightening tightens packings | throat. Replace pump packings if necessary. | |
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| on rod, restricts pump action and | See pump manual 309250. | |
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| damages packings. |
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310824D | 13 |